Tree diameter caliper



FIG. 1 is a perspective view of a tree diameter caliper showing our new design;

FIG. 2 is a frontal view of the tree diameter caliper shown in FIG. 1;

FIG. 3 is rear view of the tree diameter caliper shown in FIG. 1;

FIG. 4 is a left-side view of the tree diameter caliper shown in FIG. 2;

FIG. 5 is a right-side view of the tree diameter caliper shown in FIG. 2;

FIG. 6 is a top view of the tree diameter caliper shown in FIG. 2; and,

FIG. 7 is a bottom view of the tree diameter caliper shown in FIG. 2.

The dashed broken lines shown in the drawings illustrate portions of the tree diameter caliper that forms no part of the claimed design. 

CLAIM The ornamental design for a tree diameter caliper, as shown and described. 